I have noticed that somewhere around 2.4.17 sys_sysmips() function from
sysmips.c
was rewritten and call to o32_ret_from_sys_call disappear. This function
(o32_ret_from_sys_call)
was responsible for calling do_softirq() after each system call. I'm
curious, what is the
current mechanism in mips 2.4.x that ensures that do_softirq is called
after system call ?